Vague Google Definition "Of uncertain, indefinite, or unclear character or meaning". Text Example "And the perfume of you soul is vague and suffusing" (Handout). My own "She was vague at the fact that she might not make it".
If you have a line of trees such as these this would be a great idea for you in your backyard wedding. In the middle of each tree have a table and chairs and line the trunk of the tree with as many fairy lights as you can. They give off such a lovely ambience to your wedding ceremony outdoors.